<template>
    <div class="header">
        <!-- 折叠按钮 -->
        <div class="collapse-btn" @click="collapseChage">
            <i class="el-icon-menu"></i>
        </div>
        <div class="logo">NVS</div>
        <div class="header-right">
            <div class="header-user-con">
                <!-- 全屏显示 -->
                <div class="btn-fullscreen" @click="handleFullScreen">
                    <el-tooltip effect="dark" :content="fullscreen?`取消全屏`:`全屏`" placement="bottom">
                        <i class="el-icon-rank"></i>
                    </el-tooltip>
                </div>
                <!-- 消息中心 -->
                <div class="btn-bell">
                    <el-tooltip effect="dark" :content="message?`有${message}条未读消息`:`消息中心`" placement="bottom">
                        <router-link to="/tabs">
                            <i class="el-icon-bell"></i>
                        </router-link>
                    </el-tooltip>
                    <span class="btn-bell-badge" v-if="message"></span>
                </div>
                <!-- 用户头像 -->
                <div class="user-avator"><img src="static/img/img.jpg"></div>
                <!-- 用户名下拉菜单 -->
                <el-dropdown class="user-name" trigger="click" @command="handleCommand">
                    <span class="el-dropdown-link">
                        {{username}} <i class="el-icon-caret-bottom"></i>
                    </span>
                    <el-dropdown-menu slot="dropdown">
                        <a href="javascript:void(0);" @click="changeLanguage">
                            <el-dropdown-item v-text="$t('change_language')"></el-dropdown-item>
                        </a>
                        <el-dropdown-item divided command="loginout" >退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </el-dropdown>
            </div>
        </div>
    </div>
</template>
<script>
    import bus from '../common/bus';
    import * as types from '../../store/types.js'
    import * as util from '../../assets/util.js';
    import * as params from '../../store/appServerParams.js'
    export default {
        data() {
            return {
                collapse: false,
                fullscreen: false,
                name: 'linxin',
                message: 2,
                ws: null,
            }
        },
        computed: {
            username() {
                let username =  util.local(params.USERNAME);
                return username ? username : this.name;
            },
            refreshWebsocket(){
                return this.$store.state.refreshWebsocket;
            }
        },
        methods: {
            // 用户名下拉菜单选择事件
            handleCommand(command) {
                var vm = this;
                if (command == 'loginout') {
                    vm.$http.get("/logout").then(function (response) {
                        if (response.data.result){
                            vm.$emit('logout');
                            // localStorage.removeItem('userName');
                            // vm.$store.commit(types.LOGOUT);
                            vm.$router.push('/login');
                        }
                    })
                        .catch(function (error) {
                            console.log(error);
                            vm.$emit('logout');
                        })



                }
            },
            // 侧边栏折叠
            collapseChage() {
                this.collapse = !this.collapse;
                bus.$emit('collapse', this.collapse);
            },
            // 全屏事件
            handleFullScreen() {
                let element = document.documentElement;
                if (this.fullscreen) {
                    if (document.exitFullscreen) {
                        document.exitFullscreen();
                    } else if (document.webkitCancelFullScreen) {
                        document.webkitCancelFullScreen();
                    } else if (document.mozCancelFullScreen) {
                        document.mozCancelFullScreen();
                    } else if (document.msExitFullscreen) {
                        document.msExitFullscreen();
                    }
                } else {
                    if (element.requestFullscreen) {
                        element.requestFullscreen();
                    } else if (element.webkitRequestFullScreen) {
                        element.webkitRequestFullScreen();
                    } else if (element.mozRequestFullScreen) {
                        element.mozRequestFullScreen();
                    } else if (element.msRequestFullscreen) {
                        // IE11
                        element.msRequestFullscreen();
                    }
                }
                this.fullscreen = !this.fullscreen;
            },
            changeLanguage() {
                let vm = this;
                vm.$confirm(vm.$t('change_language_tip'), vm.$t('change_language'), {
                    confirmButtonText: vm.$t('confirm'),
                    cancelButtonText: vm.$t('cancel'),
                    type: 'warning'
                }).then(() => {
                    if (vm.$i18n.locale === 'zh-CN') {
                        localStorage.local = 'en-US';

                    } else {
                        localStorage.local = 'zh-CN';
                    }
                    vm.$i18n.locale = localStorage.local;//关键语句
                }).catch(() => {
                });
            },
            websocket () {
                let vm = this;
                if(vm.ws){
                    vm.ws.close();
                }
                vm.ws = new WebSocket('ws://' + params.BASE_URL_ + '/websocket/' + util.local('token'));
                vm.ws.onopen = () => {
                    // Web Socket 已连接上，使用 send() 方法发送数据
                    // console.log('数据发送中...')
                    // ws.send('Holle')
                    // console.log('数据发送完成')
                }
                vm.ws.onmessage = evt => {
                    console.log('数据已接收...')
                    var received_msg = evt.data;
                    console.log(received_msg);
                    if("notice" == received_msg)
                    {

                    }
                }
                vm.ws.onclose = function () {
                    // 关闭 websocket
                    console.log('连接已关闭...')
                }
                // 路由跳转时结束websocket链接
                // this.$router.afterEach(function () {
                //   ws.close()
                // })
            },
        },
        mounted() {
            if (document.body.clientWidth < 1500) {
                this.collapseChage();
            }
        },
        watch:{
            refreshWebsocket(){
                // let vm = this;
                // if(vm.$store.state.refreshWebsocket){
                //     vm.websocket();
                //     vm.$store.commit(types.REFRESH_WEBSOCKET, false);
                // }else {
                // }
            },
        },//以V-model绑定数据时使用的数据变化监测
        created: function () {
            let vm = this
            // vm.websocket();
        }
    }
</script>
<style scoped>
    .header {
        position: relative;
        box-sizing: border-box;
        width: 100%;
        height: 70px;
        font-size: 22px;
        color: #fff;
    }

    .collapse-btn {
        float: left;
        padding: 0 21px;
        cursor: pointer;
        line-height: 70px;
    }

    .header .logo {
        float: left;
        width: 250px;
        line-height: 70px;
    }

    .header-right {
        float: right;
        padding-right: 50px;
    }

    .header-user-con {
        display: flex;
        height: 70px;
        align-items: center;
    }

    .btn-fullscreen {
        transform: rotate(45deg);
        margin-right: 5px;
        font-size: 24px;
    }

    .btn-bell, .btn-fullscreen {
        position: relative;
        width: 30px;
        height: 30px;
        text-align: center;
        border-radius: 15px;
        cursor: pointer;
    }

    .btn-bell-badge {
        position: absolute;
        right: 0;
        top: -2px;
        width: 8px;
        height: 8px;
        border-radius: 4px;
        background: #f56c6c;
        color: #fff;
    }

    .btn-bell .el-icon-bell {
        color: #fff;
    }

    .user-name {
        margin-left: 10px;
    }

    .user-avator {
        margin-left: 20px;
    }

    .user-avator img {
        display: block;
        width: 40px;
        height: 40px;
        border-radius: 50%;
    }

    .el-dropdown-link {
        color: #fff;
        cursor: pointer;
    }

    .el-dropdown-menu__item {
        text-align: center;
    }
</style>
